The number refers to your band size, which is essentially the circumference of your ribcage. The letter actually refers to the difference in size between your band and bust measurements.

Our pros determined the best minimizer bras for large breasts that are the most comfortable and supportive in underwire, wireless, and full coverage styles.

Multiple reviewers say that the Bali bra is the only one they want to wear. “This is the last bra I’ll ever buy and/or wear,” ...